Category: chiral-catalyst

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.351498-10-7,6,6′-((1E,1’E)-((2,3-Dimethylbutane-2,3-diyl)bis(azanylylidene))bis(methanylylidene))bis(2,4-di-tert-butylphenol),as a common compound, the synthetic route is as follows.

Compound Int-1a (733 mg, 1.33 mmol) was suspended in ethanol (10 mL) and the resulting suspension was heated to 80 C and allowed to stir for 5 minutes. Compound Int- 1b (236 mg, 1.33 mmol) was then added and the resulting reaction was allowed to stir at 80 C for an additional 2 hours. The reaction was then cooled to room temperature using in an ice bath and the reaction mixture was filtered. The collected red solid was dried under vacuum to provide compound Int-1c (579 mg, 72%).

351498-10-7 6,6′-((1E,1’E)-((2,3-Dimethylbutane-2,3-diyl)bis(azanylylidene))bis(methanylylidene))bis(2,4-di-tert-butylphenol) 135404188, achiral-catalyst compound, is more and more widely used in various.

Reference£º
Patent; MERCK SHARP & DOHME CORP.; GIRIJAVALLABHAN, Vinay; BOGEN, Stephane; TRUONG, Quang, T.; CHEN, Ping; KEREKES, Angela; BENNETT, Frank; ESPOSITE, Sara; HONG, Qingmei; DAVIES, Ian; WO2014/62596; (2014); A1;,
Chiral Catalysts
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22795-99-9, (S)-(1-Ethylpyrrolidin-2-yl)methanamine is a chiral-catalyst compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

In a 100 mL eggplant bottle, 1.22 g of benzaldehyde, 30 mL of anhydrous ethanol,(S) -1-ethyl-2-aminomethyltetrahydropyrroline, and the mixture was heated under reflux for 24 hours.Adding 0.76 g of sodium borohydride, stirring for 3 hours, pouring into water, extracting the organic phase with dichloromethane,Dried over anhydrous magnesium sulfate, and the solvent was removed to obtain a pale yellow viscous liquid.30 mL of absolute ethanol, 0.6 g of paraformaldehyde, 2.06 g of 2,4-di-tert-butylphenol were added, and the mixture was heated under reflux for 12 hours.The crude product was chromatographed on silica gel to give colorless transparent liquid L2 (1.95 g, 44.7percent).

22795-99-9 (S)-(1-Ethylpyrrolidin-2-yl)methanamine 643457, achiral-catalyst compound, is more and more widely used in various.

Reference£º
Patent; East China University of Science and Technology; Ma, HaiYan; Wang, haobing; (35 pag.)CN103787943; (2016); B;,
Chiral Catalysts
Chiral catalysts – SlideShare

22795-99-9, (S)-(1-Ethylpyrrolidin-2-yl)methanamine is a chiral-catalyst compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

0.414 g (1 mmol) of compound 4a prepared in Preparation 9 was dissolved in 10 ml of anhydrous toluene, 0.39 ml of thionyl chloride was added, and the mixture was heated at 60 ¡ã C. under argon for 1 hour and then evaporated to dryness. 10 ml of anhydrous DCM was added,(S) -2-aminomethyl-1-ethylpyrrole 0.154g under ice-water bath, the reaction was stirred at room temperature for 8 hours, diluted with 50ml of EtOAc,Washed with saturated aqueous solution of NaHCO3, saturated NaCl three times, the organic layer was dried over Na2SO4, filtered and evaporated to give a yellowish oil,The residue was separated by a medium pressure silica gel column and the mobile phase petroleum ether: ethyl acetate 1: 1 (2percent TEA (triethylamine)). The product fractions were collected and evaporated to give 0.396 g as a yellowish oil, yield 75.6percent.

The synthetic route of 22795-99-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Beijing Nerve Surgical Department Institute; Liu Qian; Zhang Yazhuo; Yang Xiaoxiao; CN106366075; (2017); A;,
Chiral Catalysts
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673-06-3, D-Phenylalanine is a chiral-catalyst compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Step A. Preparation of Nalpha-(4-methylbenzenesulfonyl)-D-phenylalanine D-phenylalanine was reacted with 4-methylbenzenesulfonyl chloride under the conditions used in general procedure A giving the title compound which was recrystallized from ether (18%). LC-MS: 318 (M-H)-, 98% pure.

673-06-3 D-Phenylalanine 71567, achiral-catalyst compound, is more and more widely used in various.

Reference£º
Patent; Stranix, Brent Richard; Sauve, Gilles; Bouzide, Abderrahim; Cote, Alexandre; Berube, Gervais; Soucy, Patrick; Zhao, Yongsen; Yelle, Jocelyn; US2002/151546; (2002); A1;,
Chiral Catalysts
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.22795-99-9,(S)-(1-Ethylpyrrolidin-2-yl)methanamine,as a common compound, the synthetic route is as follows.

Reaction 5:In the glovebox, 500 ?? of the stock solution was transferred to the vial called chamber 2 of our 2-chamber system. Then an injection vial with the 5A MS (750 mg) was installed in the chamber 2 and the system was sealed with a crimp-cap (Aluminium Cap 20mm, silicone/PTFE). Palladium catalysed [nC]carbonylation reactions was then run following the previous described protocol. 307 MBq of crude product was isolated after flushing of the 2-chamber system. Analytical HPLC was run on an aliquot of the crude (Phenomenex Luna 5? C18 100A, 250×4.6 mm 5 micron, 35percent Acetonitrile 65percent NaH2P04 70mM, 2 mL/min). The HPLC chromatogram from the radio-channel showed that the desired[nC]raclopride was 11percent radiochemically pure.

The synthetic route of 22795-99-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; AARHUS UNIVERSITET; REGION MIDTJYLLAND; SKRYDSTRUP, Troels; LINDHARDT, Anders Thyboe; G?GSIG, Thomas; TAANING, Rolf Hejle; AUDRAIN, Helene; BENDER, Dirk Andreas; FRIIS, Stig Duering; WO2013/41106; (2013); A1;,
Chiral Catalysts
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.602-09-5,[1,1′-Binaphthalene]-2,2′-diol,as a common compound, the synthetic route is as follows.

Example 15: Separation of (S)-1 , 1 ‘-bi-2-naphthol from (RS)-1 ,1′-bi-2-naphthol via formation of binary/ternary co-crystal with 3-alkyl-4-(1′-phenylethylamino)butanoic acid. 3-alkyl-4-(1′-phenylethylamino)butanoic acid (0.385 moles) was dissolved in methanol (five volumes) and (RS)-1 ,1′-bi-2-naphthol (0.35 moles, i.e. 100 g) was added to it at room temperature. The mixture was stirred at 50 C for 2 hour, during which time solid precipitate came out from the reaction mixture. Reaction mixture was allowed to cool to room temperature and filtered under reduced pressure to obtain solid co-crystal.Co-crystal was suspended in methanol (five volumes) and stirred at 50 C for 2 h. After which reaction mixture was cooled to room temperature and filtered under reduced pressure to obtain pure solid co-crystal.Pure co-crystal was suspended in a biphasic mixture of ethyl acetate (2.5 volumes) and 1Lambda/ hydrochloric acid (2.5 volumes) and stirred for 30 to 45 min to decompose the complex. Aqueous phase was washed with 2 volumes of ethyl acetate. Organic phases were mixed together and washed with brine, followed by drying over sodium sulfate. Solvent was evaporated under vacuum to obtain optically pure (S)-1 ,1′-bi-2-naphthol which was analyzed for ee on chiral chromatography.Chiral chromatographic conditions for (S)-1.1′-bi-2-naphtholRetention time for (S)-1, 1′-bi-2-naphthol : 17.77 minRetention time for (R)-1, 1′-bi-2-naphthol : 20.64 minInstrument HPLC using a Shimadzu LC 2010 system equipped Pump, Injector, UV detector and Recorder Column: Chiral Pak IA, 4.6mm x 250mm, 5muiotaeta, column oven temperature 40 C Detector. UV at 230 nm.Mobile phase: n-hexane (94) :n-butanol (5) : ethanol (1): trifluoroacetic acid (0.3 mL) Flow rate: 1 mL minInjection volume: 20 muIota.Yield and enantiomeric excess of (S)-1 ,1′-bi-naphthol using various 3-alkyl-4-(1′- phenylethylamino)butanoic acids for co-crystal formation during resolution of (RS)-1 ,1 – bi-naphthol are tabulated below in table 4:Table 4* Data represented for antipode of (S)-1 ,1’-bi-naphthol.

As the paragraph descriping shows that 602-09-5 is playing an increasingly important role.

Reference£º
Patent; LUPIN LIMITED; ROY, Bhairab, Nath; SINGH, Girij, Pal; LATHI, Piyush, Suresh; MITRA, Rangan; WO2012/7814; (2012); A2;,
Chiral Catalysts
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173035-10-4, 1,3-Dimesityl-4,5-dihydro-1H-imidazol-3-ium chloride is a chiral-catalyst compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

A suspension of 383.0 mg (1.08 mmol) of 1,3-bis(2,4,6-trimethylphenyl)-imidazolidinium chloride (commercially available from Aaron Chemistry GmbH, D-85386 Eching) and 0.67 ml (1.14 mmol) of potassium tert.-pentylate (1.7 M in toluene) was suspended in 25 ml hexane and heated at 50 C. for 10 min. A suspension of 500.0 mg (0.54 mmol) of [RuCl2(PCy3)2(3-phenyl-indenylidene)] (commercially available from Umicore AG, D-63457 Hanau-Wolfgang) in 16 ml of hexane was added and the resulting red suspension stirred at 50 C. for 18 h. The reaction mixture was evaporated to dryness and the isolated crude product purified by silica gel chromatography (hexane/diethylether 6:4) to yield 257.0 mg (50%) of the title compound as red crystals. MS: 948.3 (M+). 31P-NMR (121 MHz, C6D6): 25.8 ppm; 1H-NMR (300 MHz, C6D6): 1.00-1.40 (m, 18H); 1.45-1.64 (m, 6H); 1.65-1.95 (m, 6H); 1.80 (s, 3H); 2.23 (s, 6H); 2.38 (s, 3H); 2.85 (s, 3H); 2.87 (s, 3H); 3.10-3.45 (m, 4H); 6.02 (s, 1H); 6.47 (s, 1H); 6.97 (s, 2H); 7.05-7.35 (m, 6H); 7.84 (s, 1H, RuCCH); 7.89 (m, 2H); 9.16 (m, 1H). Anal. calcd. for C54H69N2Cl2PRu: C, 68.34; H, 7.33; N, 2.95. Found: C, 68.61; H, 7.32; N, 2.68.

As the paragraph descriping shows that 173035-10-4 is playing an increasingly important role.

Reference£º
Patent; Puentener, Kurt; Scalone, Michelangelo; US2006/241156; (2006); A1;,
Chiral Catalysts
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With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.250285-32-6,1,3-Bis(2,6-diisopropylphenyl)imidazolium chloride,as a common compound, the synthetic route is as follows.

General procedure: A 20 mL vial was charged with the NHC¡¤HCl (300 mg, 1 equiv.) and the zinc salt (1 equiv.). Tetrahydrofuran (5 mL) was added, the vial was sealed with a screw-cap and the reaction was stirred at 60C for two hours. The mixture was allowed to reach room temperature and the solvent was removed under reduced pressure toafford the desired product. 2.2.1. Synthesis of [IPrH][ZnCl3] (4a) Colorless solid (368 mg, 93%). 1H NMR (400 MHz, CDCl3, 298 K): delta = 1.14 (d, 3JH-H = 6.9 Hz, 12H, CH-CH3), 1.31 (d, 3JH-H = 6.9 Hz, 12H, CH-CH3), 2.53 (sept, 3JH-H = 6.9 Hz, 4H, CH-CH3), 7.32 (d, 3JH-H = 7.7 Hz, 4H, CH phenyl), 7.55 (t, 3JH-H = 7.8 Hz, 2H, CH phenyl), 8.00 (s, 1H, H2), 8.46 (s, 2H, H4 and H5). 13C-{1H} NMR (75 MHz, CDCl3, 298 K): delta = 24.0 (s, CH-CH3), 25.0 (s, CH-CH3), 29.0 (s, CH-CH3), 124.8 (s, CH Ar), 128.6 (s, CH Ar), 129.9 (s, CIV), 132.2 (s, CIV), 134.3 (s, C2), 145.6 (s, C4 and C5). Anal. Calcd for C27H37Cl3N2Zn: C, 57.77; H, 6.64; N, 4.99. Found: C, 57.84; H, 6.61; N, 5.05.

The synthetic route of 250285-32-6 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Santoro, Orlando; Nahra, Fady; Cordes, David B.; Slawin, Alexandra M.Z.; Nolan, Steven P.; Cazin, Catherine S.J.; Journal of Molecular Catalysis A: Chemical; vol. 423; (2016); p. 85 – 91;,
Chiral Catalysts
Chiral catalysts – SlideShare

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.351498-10-7,6,6′-((1E,1’E)-((2,3-Dimethylbutane-2,3-diyl)bis(azanylylidene))bis(methanylylidene))bis(2,4-di-tert-butylphenol),as a common compound, the synthetic route is as follows.

A 50 mL flask was charged with N,N?-bis(3,5-di-tert-butylsalicylidene)-1,1,2,2-tetramethylethenediamine (0.4302 g, 0.78 mmol, 1.0 equiv), EtOH (17 mL), and Co(OAc)2 (0.1385 g,0.78 mmol, 1.0 equiv). The mixture was degassed and then heated to reflux under nitrogen for 3 h,cooled to room temperature. The precipitate was filtered and the purple solid was washed with EtOH(10 mL) and dried under high vacuum to give 0.3533 g (75%) of the cobalt(II) complex.

As the paragraph descriping shows that 351498-10-7 is playing an increasingly important role.

Reference£º
Article; Zhuang, Linghang; Tice, Colin M.; Xu, Zhenrong; Zhao, Wei; Cacatian, Salvacion; Ye, Yuan-Jie; Singh, Suresh B.; Lindblom, Peter; McKeever, Brian M.; Krosky, Paula M.; Zhao, Yi; Lala, Deepak; Kruk, Barbara A.; Meng, Shi; Howard, Lamont; Johnson, Judith A.; Bukhtiyarov, Yuri; Panemangalore, Reshma; Guo, Joan; Guo, Rong; Himmelsbach, Frank; Hamilton, Bradford; Schuler-Metz, Annette; Schauerte, Heike; Gregg, Richard; McGeehan, Gerard M.; Leftheris, Katerina; Claremon, David A.; Bioorganic and Medicinal Chemistry; vol. 25; 14; (2017); p. 3649 – 3657;,
Chiral Catalysts
Chiral catalysts – SlideShare

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.602-09-5,[1,1′-Binaphthalene]-2,2′-diol,as a common compound, the synthetic route is as follows.

5.73 g (20 mmol) of (1,1?-binaphthalene)-2,2?-diol and 4.10 g (20 mmol) of p-TsOH were dissolved in 150 mL of toluene, and then stirred at about 100 C. for about 12 hours. The resulting product was cooled down to room temperature, and an aqueous potassium carbonate solution was added thereto, followed by extraction three times with 60 mL of ethyl acetate. An organic layer was collected from the resulting product and dried using magnesium sulfate. After evaporating the solvent from the resulting product, the residue was separated and purified using silica gel column chromatography to obtain 3.76 g (Yield: 70%) of Intermediate I-1. This compound was identified using liquid chromatography-mass spectrometry (LC-MS). (0315) C20H12O: M+1 268.3

602-09-5 [1,1′-Binaphthalene]-2,2′-diol 762831, achiral-catalyst compound, is more and more widely used in various.

Reference£º
Patent; SAMSUNG DISPLAY CO., LTD.; Park, Junha; Kim, Youngkook; Sim, Munki; Lee, Eunyoung; Jeong, Eunjae; Hwang, Seokhwan; Kim, Donghyun; (122 pag.)US2016/285011; (2016); A1;,
Chiral Catalysts
Chiral catalysts – SlideShare